print(9/2)  # 4.5
print(9//2)  # 4
print(9%2)  # 1
print(2**4)  # 2*2*2*2  16
print("======================================")
print(5>3, 10<15, 1==2, 1!=2)  # True, True, False, True
print(10<15<20, 10<15>13)  # True True
print("======================================")
print(5>3 and 10>5, 3>5 or 1==2, not 10>50) # True,False,True